By: Judy Evans
The macadamia tree is an Australian native but there are now few left in the wild. Luckily they are cultivated by the score for the commercial value of their nuts which can be eaten raw or roasted or used in cooking. Macadamia oil is the...
Trees of Australia: Gidgee tree
By: Judy Evans
The gidgee tree (Acacia cambagei) is endemic to Australia. It is also known as the gigyea, gidya and gidgea but these names are all variations on a theme. The name which gives a clue to the essential character of the tree is ‘stinking wattle&rsquo...
Plant profiles: Giant saguaro
By: Lea Miller
When you think of the desert southwest, you probably picture a tall, stately cactus with branches looking like arms, silhouetted by the sunset. This is the giant saguaro. Saguaros are native to parts of the Sonoran desert, in an area that covers southwestern Arizona and...
Dolphins and intelligence
By: Edward M. Maclachlan
When you look a dolphin in the eyes, they seem almost human-like, and when they smile, you feel like someone you know is smiling at you. What makes dolphin trainers, zoo keepers, and researchers psychologically bond to these animals? What makes dolphins so different from...
An overview of the circulatory system of a shark
By: Edward M. Maclachlan
Sharks are fish, and as such, they have a closed circulatory system (the blood never leaves the web of blood vessels). The blood is pumped through a singular loop throughout the body, to transport nutrients, gases, hormones, blood cells, nitrogen waste products, etc. back and...
Why do people breathe?
By: Tami Port MS
Breathing is essential to life. Yet most of us don't even give a thought to our respiration. Why is it that people need to take in oxygen and expel carbon dioxide? The answer relates to how we extract energy from the food we eat, an...
What is a biological species?
By: Heather Lyon
Humans have a need to classify and simply information. One way we do this in biology is by naming and classifying all the organisms that have been discovered. A scientific name is given to all organisms so that they can be distinguished from one...
Why are Galapagos penguins unique?
By: Shelly Barclay
The Galapagos Penguin is just one of the many endemic species on the Galapagos Islands that have differentiated themselves from other species by adapting to fit their rather unique surroundings. There are many things that make the Galapagos Penguin unique among penguin species. By...
The mottled duck: Identification and description
By: Jack Winter
The mottled duck (Anas fulvigula maculosa) is a large duck with a mottled fuscous-brown plumage (Bellrose 1980). The sexual dimorphism of the mottled duck is hard to distinguish because both sexes have nearly the same coloration the exception is that the female has lighter...
By: Jack Winter
It seems that there is a lot of research to be done on the common redpoll, this scientist found too many notes in the reference material that suggested there was not enough or no proof on certain aspects of the common redpoll. What he...

 

1 8 9 10 11 12 372